new crane ignition or old one
 

i have a hp 465 , running 731 crane cam and dart intake, i cloned a hp 500. have a rev limiter set at 5350,,, the question
is do i put a new hi 6m box in with a rev limiter set to 5600 or higher
will i see that much more in top end , i run a 27 mirage plus labbed, looking to hit 80 plus

A few years back my cousin had his 454cid engine on Tom Earhart's dyno with a Merc Thunderbolt distributor. We added a Crane Hi 6M ignition box and made a few pulls to 5500rpm or so.......no difference in power, but a really nice feature that an ignition box can do for you is give a mulitple spark at idle speeds which keeps plugs from loading up/fouling out.